Checking if an overridden parent method exists before calling it

Question

How would I go about ensuring that the overridden parent method exists before I call it?
I've tried this:

public function func() {
    if (function_exists('parent::func')) {
        return parent::func();
    }
}

However the function_exists never evaluates to true.

Answer 1

I've not checked this, but is the correct function method_exists?:

http://php.net/manual/en/function.method-exists.php

Answer 2

<?php
class super {
    public function m() {}
}

class sub extends super {
     public function m() {
        $rc = new ReflectionClass(__CLASS__);
        $namepc = $rc->getParentClass()->name;
        return method_exists($namepc, __FUNCTION__);
    }
}

$s = new sub;
var_dump($s->m());

gives bool(true). Not sure if this would work if the method was defined in a superclass of super, but it would be a matter of introducing a simple loop.